On The Application Of Gibbs Equations In Determining The Relationships Of Vapour Pressures To Phase Diagrams Of The Reactive Chloride Systems

Abstract

Most of the phase diagrams reported in the literature have been determined in open atmospheric conditions indicating that the substances involved are not influenced by the presence of air and moisture. In these cases, the Gibbs phase rule is applied in its open condition of 1 atm pressure, and no special conditions need to impose. However, for many elements, such as all reactive metals, the phase diagrams are determined by conditions imposed to remove all the reactive actions of the presence of an atmosphere. In these cases, a special cell is needed to be constructed in a way that the material of construction of the cell and the absence of air is secured. The Gibbs phase rule is applied in its full mathematical formulation in those cases. The present publication reports on the determination of correct conditions to obtain meaningful results on the phase diagrams.